Latch lock



April '26,, 1927. 1,626,384

A. BOGE LATCH LOCK Filed Sept. 12, 1924 g fu eutar,

Patented Apr. .26,- 19227.

ADOLF IBOGE, 0F SOLINGEN, on e 1 Maren LooK.

Application filed September 12, 1924, Serial No. 737,285, and in Gcrmany September 12, 1923. j

The invention relates to a latch lock provided with a latch capable of being secured or fastened in its locked or unlocked position, which lock maybe opened on the one hand by means of a cylinder lock and on the o'her hand by means of a turnable han dle or pressure member. In known locks of this kind the securing or fastening of the latch has been possible only from one side of the door (the inside) and has been effected by a separate knob arranged close to the pressure member.

In connection with locks of-this kind it has already been proposed to secure the latch by means of a transverse bolt. In that case there were provided two separate transverse bolts for securing the latch from the outside and from the inside of the door, of which bolts one could be shifted by means of an arm of the boss coupled to the cylinder-lock while, for adjusting the other bolt, there was provided onthe inside of the door a separate handle independent of the handle for retracting the latch. Moreover the securing of the latch eiiected from the inside of the door, could be released from without, while on the other hand the securing efl'ected from the outside could be released only from the outside, but not from the inside. This was attained by the two transverse bolts being coupled together in such manner that the bolt adjustable by the cylinder-lock drove with it in its movement in the direction of latch-retraction the other transverse bolt, while on the other hand in" its movement in the direction of latch-release said bolt moved independently of the transverse bolt adjustable by the cylinder lock.

According to the present invention, this proposed lock is very considerably, simplified in construction and operation in that, for securing the latch from'the outside and inside of the door, only a single transverse bolt is provided, which can be 0 erated both by the arm of the boss couple to the outside cylinder-lock and b the arm of the inside handle-boss or cylin er look. In this case of course provision mustbe made by suitable co-ordination of the two boss-arms and the abutment on the transverse boltcoacting with them that the arm of one boss does not revent movement of the bolt by the arm 0 the other boss. The arrangement- ,may' be suchthat the latch secured by means of the inside handle may be released-by means of the. outside cylinder-lock and vice versa. The lock moreover may, as is known per. se, be so arranged that the latch secured by means of the outside cylinder lock cannot be retracted by means of the inside handle, as will be necessary in many cases to prevent burglars from opening the door from the inside after they have broken open the window possibly fitted to the-door. To this end in the new lock the plate-like abutment or stop on the transverse bolt for retracting the latter need merely be provided with a slot into which the arm of the inside handle-boss enfers and is consequently rendered inoperative when the bolt is moved by the other boss in the securing position. i

One embodiment of the invention is illustrated by way of example in the accompanying drawings wherein, I i Figs. 1 to 3 are views of the new lock with cover removed in three-'difi'erent positions,

Fig. 4 is an interior view of the lock cover with a boss journalled therein, the latch and transverse bolt being shown in dotted lines,

Fig. 5 is a horizontal section and i Fig. (i a vertical section of the lock anddoor, and t gig, 7 is a plan view of thetransverse The embodiment shown isv a case lock wherein the latch can be secured from both sides, but the fastening of the latch by means of the cylinder lock cannot be released again by the pressure member. a

indicates the lock casing 'which is integral with the bottom 6 and is secured to the inside of the door by means of the lock cover a in the usual manner, The main or latch bolt 7 is guided at its head f in the flanged portion of the lock, while its stem or body is guided, by means of a rod 9 secured thereon, in an eye providedon the lock-bottom. This rod is provided with a helical spring h which tends to press the latch bolt into its closing position. Journalled in the lock-bottom b is a boss k provided with a rollback arm 70 and rigidly coupled wlth a turnable handle or pressure member 2' arranged on the outside of the lock-bottom. J ourna'lled in the lock-cover c is a second-boss m which is coaxial with the first and is provided with a rollback arm m.

This boss is coupled in known manner by means of a flat coupling. pin n" with the The slot in the latch-stem is provided at its lower edge with two seatings or recesses r,

1' into w ich the pin 9 enters when the bolt 0 is in its lower end position in order to secure the latch in its closin position as al-' so, if desired, in its retracte position. The

pin 1 at the same time constitutes a stop for the arms on the two bosses in, m, which can so coact with the pin that when the one or the other boss is turned in a direction op posite to that of the openin movement the transverse bolt 0 is shifted y the pressure of the arm on the boss into its lower end position. A second. stop for the arms of the bosses is formed by a plates provided at the upper end of the bolt 0 and arranged at right angles to the plane of the bolt, with which plate the said arms coact in the lower end position of the bolt 0 in order to bring the latter back again into its upper end position by 'turningthe boss in the direction of the opening movement. -The bolt is retained in its end positions by means of a sprin -influenced snap-in bolt t which is guide in a transverse hole in the lock-bottom b and engages in seatings in the bolt.

The arm 0 the boss m coupled with the cylinder lock n takes up the slanting position shown in Fig. 4 when the rotary cylinder is in its locking position, in which slantini position this arm is situated 'between t e two stops g, 8. Moreover, the arm m is of such a len h that it will not prevent depression of t e transverse bolt by the other boss is, it being possible, however, to

' raise the bolt again not only by means of the latter boss but also by means of the bossm coupled with the cylinder lock. The area In of. the boss coupled with the handle 1' is longer than the arm m and in the normal position of the latter takes up the approximately vertical position shown in- Fig. 1 in which its curved rear portion liesclwe above the lower stop whereas itsfree end is about on a level wit the upper stop a. In order that this arm shall notv prevent the bolt 0 from being depressed by the how 11:, the upper plate-like step a is rovided with an angular slot 14 into whi. the arm 11 'enters when the transverse bolt is depressed b'y' the 7 boss m this am being-simultaneous! seine-.- wh atltii i'ned in the direction of its imvenua'nt. In this way the result is at the retain the boss 7:: and handle 11 in their nor- 7 mal positions a flat spring '0 which is substantially V-shaped is provided, a limb of" which presses on a lateral flat on the boss.

The mode of operation of the new lockfiis set forth 'in sequenceas follows:

' The latch f can be moved from the closing position shown in Fig. 1 into the opening 0- 's ition shown in Fig. 2 by the cylinder locE n or the pressure member-z} as desired. For

this purpose it is necessary only to turn 30 either the rotary cylinder of the cylinder lock n or the pressure member 11 in the direction of the opening movement (arrow in in Fig. 2 or arrow 3] in Fig. 4). In order to secure the latch f which has been shot forward,'the handle 5 is turned against the. direction of movement for opening, that is, against thedirection of the arrow :22. ,The transverse bolt ois thus moved downwards by the pressure of the arm 70 on the pin so that the pin q engages in the gap 1' in the latch-stem. To release the fastening again, the handle 2' need only be turned in the direction of the opening movement, where by the arm 70 of the boss is in coacting with the stop plate 8 shifts the transverse bolt again into its upper end position. Instead o the latch fastening being released by the pressure member 11 it may be released by the cylinder lock n, the rotary cylinder of the latter being likewise turned in the direction of the opening movement, the arm m of the boss m. shifting the transverse bolt 0 upwards. In a similar manner to that just described the latch which has been pressed back by hand when the door is open may-be fastened in its opening position when the door is not to be retained for the time being. In this case the blocking pin 9 coacts with the gap 1'. I

The securing of the latch in its closing position b means of the cylinder lock n is effected y the rotary cylinder of the latter being likewise turned against the direction of the opening movement, that is, against 1 that of the arrow 3 thearm m of the boss m shifting the transverse bolt 0 into its lower end position. when the lock cylinder is turned in the direction of the opening movemeat-(of arrow 3 the bolt is again moved upwards and the latch is no longer secured. S ould the latch have been secured by means of the cylinder lock it cannot, however, be released by the pressure member 2'. For when the transverse-bolt o is depressed by the cylinder lock, the hos 17 coupled with the pressure member i-is put out of action in that its arm in enters the slot u in the stop late 8 (ef. the a a ime9bta1nedthat, when the ash f esin Fi .3

' shown in dotted can than indeed P9 latch bolt, a second bolt movable transversely of said latch bolt for locking the latter. in projected position, and a pair of independently operable bolt controlling members, each operable to effect the pro ection of the .second bolt and the retraction of both bolts.

2. In a lock, a cylinder loclr unit, a bandle unit, said units being coaxially arranged and each of said units having a rollback, an

automatically projectible main bolt, and a second bolt movable transversely of sald main bolt for locking said main bolt in projected position, said main bolt being retractable by tire-rollback of either unit and said second bolt being both projectible and retractable by the rollback of either nnil.

3. In a look, a latch bolt, a second bolt for locking the latch bolt in projected position,

. and a'pair of bolt controlling members each normally independently operable to effect the projection and retraction of both bolts, one of said members being operative in its .bolt projecting motion to render the other member ineffective for bolt releasing actions while the said second bolt remains projected and under the control of the first-named member.

4. In a look, a latch bolt, a second bolt movable transversely of the latch bolt into and out of engagement therewith, and a bolt actuating element movable in reverse direc- ,tions for bolt projecting and releasing actions, said member having an arm operative on its bolt projecting motion to engage and project said second bolt, and operative on its bolt releasing motion to engage and retract said second bolt and then engage and retract the latch bolt.

5. In a look, a latch bolt having a locking recess, a second bolt movable transversely of the latch bolt, said second bolt having a pair of spaced projections, one of said projections being adapted for locking engagement with said recess, and a bolt actuating member movable in reverse directions for simultaneous bolt projecting and retracting actions, said member having an arm movable between said spaced pro ections on the second bolt, said arm being operative on the bolt projecting motion to engage one of said contacts and shift the same into engagement with the recess in the latch bolt and operative on the bolt releasing motion to engage the other contact of said second bolt to move the first-named contact out of said recess. I

6. In a look, a latch bolt, a second bolt movable transversely of the latch bolt for engagement therewith and disengagement therefrom, and a pair of bolt actuating devices each normally independently operative for projecting and retracting the bolts, each of said devices having an arm and said second bolt being providedwith a pair of contacts between which said arm is dispcsed, said arm being movable into engage-- ment with said contacts on reverse movements of the actuating device for shifting said second bolt into and out of locking position.

7. In a lock, a latch bolt, a second bolt movable transversely of the latch bolt and having a pair of spaced projections,'one of said projections being movable into and out of locking engagement with the latch .bolt, and a pair of bolt actuating devices.

each normally operative independently of the other for bolt projecting and retracting actions, each bolt actuating device having an arm' movable between the contacts of said second bolt for respectively projecting and retracting the same, the other of saidprojections and the arms of the actuating devices being so relatively constructed as to render one of said bolt actuating devices inefiective for bolt releasing actions upon the projection of the bolts by the other bolt actuating device and while said bolts are under the control of the latter.

8. In a lock, a latch bolt having a locking recess, a second bolt movable transversely of the latch bolt and having a locking pin movable into and out of engagement with said recess in the latch belt, a projection on said second bolt spaced from said locking pin and provided with a slot and a pair of contact surfaces, and a pair of rotary bolt actuating members each normally operable independently of the other for bolt projecting and retracting actions, each actuating device being provided with a curved arm for coaction with said locking pin and projection to project and retract said second bolt, the arm of one actuating device being shorter than the other, the short arm of one actuating device being engageable with one contact surface of the projection for retracting said second bolt, and the long arm of the other actuating device being engageable with the other contact surface of said projection for retracting said second bolt, said long arm being movable into the slot of said projection and to a position inoperative for retracting said second bolt following a .bolt' projecting action by the actuating de to successively project the latch bolt and second bolt and in a reverse direction to retract said bolts in inverse order. I

10. A lock comprising a casing, a latch bolt slidable therein, spaced interconnected notches formed in said bolt, a second bolt movable transversely of said latch bolt, a pin carried by said second bolt adapted to seat in said notches, and spaced pivoted arms cooperating with said pin for shifting said second bolt to hold said latch bolt in latched or unlatched position.

11. A lock comprising a casing, a latch bolt slidable'therein, spaced interconnected notches formed in said bolt, a second bolt movable transversely of said latch bolt, a pin carried by said second bolt adapted to seat in said notches, resilient means for holding said second bolt in its extreme positions, and spaced pivoted arms cooperating with said pin for shifting said second bolt to hold said latch bolt in latched or unlatched position.

12. A lock comprising a casing. a latch bolt slidable therein, spaced interconnected notches formed insaid bolt, a second bolt movable transversely of said latch bolt, a pin carried by said second bolt adapted to alternately seat in said notches, resilient means for holding said second bolt in its extreme positions, and spaced individually operable pivoted arms for shifting said latch bolt and cooperating with said pin for shifting said second bolt to hold said latch bolt in latched or unlatched position. i

13. In a look, a cylinder lock unit, a handle unit, said units being coaxially arranged and each of said units having a rollback, a spring-projected main bolt directly engageable and retractable b the rollback of either unit, and a second be t movable transversely of said main bolt for locking said main bolt in projected position, said second bolt being directly engageable and projectible and'retractable by the rollbacks of both the cylinder and the said handle units.

In testimony 'whereof I aflix my signature.

ADOLF- BOGE. 

